My Profile Photo

Sheogorath's Blog


Depending on the time of the day a friend, a colleague, a wise guy. The beauty of the world is its sense of humor to show humans their way by letting them search their own.


Cover image for this blog post

Making oxygen with candles

Today I learned, that one can burn candles to produce oxygen. Of course not your every day candles but so-called chlorate candles, which are made of sodium chlorate and iron powder. The iron powder is then enlightened to burn at around 600°C producing sodium chloride, iron oxide and oxygen. The key is, that the oxidization of the iron powder frees more oxygen from the sodium chlorate than it needs resulting in a positive oxygen output.

I came across this while watching this episode of “Smarter Every Day” talking about how nuclear submarines produce oxygen while staying under water for weeks.